Photovoltaic (PV) Systems F.A.Q.s

Q. How does a Photovoltaic system work?

A. A PV (Photovoltaic) Electrical System is a system that harnesses the energy of the sun. PV modules (panels) are made up of photovoltaic cells, and function like calculators & other small appliances. PV modules (panels), are then grouped together on a roof or ground framework facing South (ideally) to capture the sun’s energy throughout the day. This energy can then be used to directly power your home or commercial building.

Q. How long has PV been around?

A. The photovoltaic effect was first recognized in France, in 1839. Modern PV technologies were developed in the mid 1950s & many systems are still working well 25+ years after installation in the U.S. and around the world.

Q. What rebates and incentives are available for me?        

A. The CT Clean Energy Fund (CCEF) has a rebate program in place that will pay for up to 60% of a new system cost.  The average homeowner will receive a rebate of 40%-50%.  This rebate amount will be taken off the total of your install.  You pay the total system cost less the estimated rebate amount.

• The CCEF (Connecticut) offers a special loan program with 1%, 3%, or 6% interest rates on energy-saving investments, such as solar, for your home.
• If you install a solar electric system on your home in 2008, you will be eligible for a $2000 federal tax credit on your 2008 return.  * Please consult a tax professional.
• Commercial systems qualify for a 30% Federal tax credit & bonus depreciation schedule.

Q. What about cloudy days?   

A. In summer months you will produce more electricity than you use.  This electricity goes back into the utility grid and will be credited at retail value to your account.  In the winter months or on cloudy days you will produce less than you are using & will use your credit with the utility company.  If you purchase a system to cover 100% of your projected use (based upon previous year’s utility bills), over 12 months you and the electric company should even out if your power use is the same as the previous year’s average.

Q What happens if the power goes out? 

A. A solar system using batteries for storage can "ride-out" utility blackouts. Batteries add significantly to the expense of a system while providing no payback, need weekly maintenance, are hazardous and will need replacing every five to ten years. For this reason most consumers opt for a "grid-tie" system.  A gas or propane generator may work better if you lose power frequently.

Q. How much does a system cost?  

A. The biggest factors will be the amount of electricity you want to produce and, the orientation and shading of your home.  Facing South with little or no shading is best.

See our list of general F.A.Q.s here.